<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>form的语义化</title>
</head>
<body>
    <fieldset>
        <legend>用户信息</legend>
        姓名：<input>
        年龄：<input><br>
        手机：<input type="tel">
        邮箱：<input type="email">
    </fieldset>
</body>
</html>